Stereotype-plate holder



A. OVEREND.

STEREOTYPE PLATE HOLDER.

Patented Sept. 18, 1888;

I (No Model.)

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ANDREW OVEREND, OF PHILADELPHIA, PENNSYLVANIA.

STEREOTYPE-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 389,715, dated September 18, 1888.

Application filed February 6,1888. Serial No. 263,098. (No model.)

To all whom it may concern.-

Be it known that I, ANDREW OVEREND, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Stereotype-Plate Holders, ot which the following is a specification. I

My invention relates to improvements in, the stereotype-plate holders for which Letters Patent were granted to me on the 24th day of January, 1882, No. 252,694, the object of the present invention being to dispense with the rightand-left hand screwspindle, and form the screw on a separate spindle, so that the grippingjaws now in use can be used in con.-.

I nection with my invention; and, further, that the construction of the device will be simplified. In the accompanying drawings, Figure 1 is a sectional perspective view of a block provided with my stereotype-plate holders. Fig. 2 is an enlarged section on the line 1 2. Fig. 3 is an enlarged section on the line 3 4, and Fig. 4 is a plan View.

A is a block, which may be made of any material suitable for the purpose and of any convenient size, depending greatly upon the work for which it is used.

In blocking up stereotypes it is preferable to have the stereotype centrally situated on the block, and by providing jaws adapted to be fed toward the middle by operating the usual pinion at the end the stereotype is cen tralized. This I do in the device described and claimed in my patent above referred to.

B is a sleeve having at the end a pinion, 1), adapted to be acted upon by one of the usual racks used in connection with stereotype-plate holders. This pinion is sunk deep enough to be below the level of the block A. On the sleeve B is cuta screw-thread,which is adapted to an internal thread on a jaw, D, which can slide in a slotted way, a, in the block A. Said sleeve B also has an internal screw-thread adapted to a thread on the spindle e of the tion, so that any common form of jaw can be adapted to my improved block.

As will be seen, by turning the pinion I) and the sleeve B thejaws D and E are moved together or parted simultaneously, as the case may be, the threaded sleeve taking up very little room in the block, so that all the working parts are practically at one side of the block. There are as many of these clampingblocks as circumstances require. In the present instance I have shown two pairs of side clamps and one pair of longitudinal clamps. The longitudinal clamp passes over the side clamps, asshown in Figs. 1, 2, and 3, and its pinion b is made a trifle smaller than the pinion b, so that both pinions will be of the same height as regards the top surface of the block A.

A metallic rib, f, extends around the two sides of the block A, forming-a groove, 9, in which the pinions rest.

I claim as my invention- 1. The combination, in a stereotype plate holder, of the block A and the threaded sleeve B, having an external and an internal thread. with jaws D and E, having portions adapted to these threads, substantially as set forth.

2. The combination, in a stereotype-plate holder, of the longitudinal clamp, with a transverse clamp or clamps passing under said longitudinal clamp, and operating pinions for said clamps, the pinions of the transverse clamps being larger than the pinions of the longitudinal clamp, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two sub scribing witnesses.

ANDREW OVEREND.

Witnesses:

HENRY Howson, HARRY SMITH. 

